CSDMS 2014 annual meeting poster Yu Zhang

From CSDMS
Presentation provided during CSDMS annual meeting 2014

Fully-Coupled Hydrologic-Morphologic Processes for Modeling Landscape Evolution

YU Zhang, The Pennsylvania State University University Park Pennsylvania, United States. YZZ130@PSU.EDU
Rudy Slingerland, The Pennsylvania State University University Park Pennsylvania, United States. rxs15@psu.edu
Christopher Duffy, The Pennsylvania State University University Park Pennsylvania, United States. cxd11@psu.edu

CSDMS2014 poster YuZhang.png

Abstract:

Investigating the impacts of properties, distribution and evolution of regolith on river channel, fluid pathways, flow rate and sediment transport is essential to resource management and restoration efforts. Besides field experiment studies, numerical simulation is also an efficient way to explore the relationship between the hydrological and morphological processes. Recent studies focus more on the interaction of physical processes that govern the surface hydrodynamics and morphodynamics. However, the fluid flow on the subsurface layer plays an important role on landscape evolution as well.

This study takes into account of the water exchange between surface and subsurface and water flow within subsurface and fully couples them into a 3D hydrologic-morphodynamic model (LE-PIHM) for regolith formation and landscape evolution by using finite volume strategy. Two scenarios, coupling subsurface flow and no subsurface flow, are applied in a synthetic experiment. A comparison of the simulation results in the two scenarios at steady state indicates that subsurface flow has significant influences on the distribution of regolith, steepness of hillslope, network density, drainage area and water balance.

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